290d906084
initial call to sched_balance() during startup is meant to initialize balance_ticks, but does not actually do that since smp_started is still zero at that time. Since balance_ticks does not get set, there are no further calls to sched_balance(). Fix this by setting balance_ticks in sched_initticks() since we know the value of balance_interval at that time, and eliminate the useless startup call to sched_balance(). We don't need to randomize the intial value of balance_ticks. Since there is now only one call to sched_balance(), we can hoist the tests at the top of this function out to the caller and avoid the overhead of the function call when running a SMP kernel on UP hardware. PR: 223914 Reviewed by: kib MFC after: 2 weeks
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